separate logins to modify pages?

separate logins to modify pages?

is there a way to have separate logins for admin? is there no differentiation between the admin who created and installed the program from the client areas?in other words i have installed the powercms, have access to modifying the pages from the admin area, but want to have my clients with separate login, or perhaps several different logins for separate pages to modify. no way to do this?-thanks in advance